in the case book, you can read the final twelve stories that sir arthur conan doyle wrote about his brillisnt detective. they are perhaps the most unusual and the darkset that he penned. treachery, mutilation and the terrible consequenees of infidelity are just some of the themes explored in these stories, along with atmospherie touches of the gothie, involving a bloodsueking vampire, erypts at midnight and strage bone in a furnaee.